This is a note to let you know that I've just added the patch titled
net: sctp: rfc4443: do not report ICMP redirects to user space
to the 3.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-sctp-rfc4443-do-not-report-icmp-redirects-to-user-space.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 1156da72415e5bb0d510ea0b1ce4bf7512330a18 Mon Sep 17 00:00:00 2001
From: Daniel Borkmann <[email protected]>
Date: Mon, 16 Sep 2013 12:36:02 +0200
Subject: net: sctp: rfc4443: do not report ICMP redirects to user space
From: Daniel Borkmann <[email protected]>
[ Upstream commit 3f96a532113131d5a65ac9e00fc83cfa31b0295f ]
Adapt the same behaviour for SCTP as present in TCP for ICMP redirect
messages. For IPv6, RFC4443, section 2.4. says:
...
(e) An ICMPv6 error message MUST NOT be originated as a result of
receiving the following:
...
(e.2) An ICMPv6 redirect message [IPv6-DISC].
...
Therefore, do not report an error to user space, just invoke dst's redirect
callback and leave, same for IPv4 as done in TCP as well. The implication
w/o having this patch could be that the reception of such packets would
generate a poll notification and in worst case it could even tear down the
whole connection. Therefore, stop updating sk_err on redirects.
Reported-by: Duan Jiong <[email protected]>
Reported-by: Hannes Frederic Sowa <[email protected]>
Suggested-by: Vlad Yasevich <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/sctp/input.c | 3 +--
net/sctp/ipv6.c | 2 +-
2 files changed, 2 insertions(+), 3 deletions(-)
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -648,8 +648,7 @@ void sctp_v4_err(struct sk_buff *skb, __
break;
case ICMP_REDIRECT:
sctp_icmp_redirect(sk, transport, skb);
- err = 0;
- break;
+ /* Fall through to out_unlock. */
default:
goto out_unlock;
}
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -189,7 +189,7 @@ static void sctp_v6_err(struct sk_buff *
break;
case NDISC_REDIRECT:
sctp_icmp_redirect(sk, transport, skb);
- break;
+ goto out_unlock;
default:
break;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.11/net-sctp-rfc4443-do-not-report-icmp-redirects-to-user-space.patch
queue-3.11/net-sctp-fix-ipv6-ipsec-encryption-bug-in-sctp_v6_xmit.patch
queue-3.11/net-sctp-fix-bug-in-sctp_poll-for-sock_select_err_queue.patch
queue-3.11/net-fib-fib6_add-fix-potential-null-pointer-dereference.patch
queue-3.11/net-flow_dissector-fix-thoff-for-ipproto_ah.patch
queue-3.11/net-sctp-fix-smatch-warning-in-sctp_send_asconf_del_ip.patch
--
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